More work on refactor to interfaces

Plugins/PkmnLib.Plugin.Gen7/Scripts/Status/BadlyPoisoned.cs

@@ -1,7 +1,7 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Status;
 
 [Script(ScriptCategory.Status, "badly_poisoned")]
-public class BadlyPoisoned : Poisoned
+public class BadlyPoisoned : Poisoned, IScriptOnEndTurn
 {
     private int _turns = 1;
 
@@ -9,7 +9,7 @@ public class BadlyPoisoned : Poisoned
     public override float GetPoisonMultiplier() => 1f / (16f * _turns);
 
     /// <inheritdoc />
-    public override void OnEndTurn(IScriptSource owner, IBattle battle)
+    public void OnEndTurn(IScriptSource owner, IBattle battle)
     {
         base.OnEndTurn(owner, battle);
         _turns = Math.Min(_turns + 1, 15);